Thousands of people have reported UFOs or alien encounters in Northern California. That number could soon go up.

The search for life beyond Earth has always been full of surprises. Strange radio signals have sparked excitement. Odd gases on distant worlds have raised questions. Even ordinary objects have been ...

When it comes to the search for life elsewhere in the universe, methane and other chemical compounds are seen as signs of ...

Some of these approaches may show promise, but new research indicates much of today’s AI is even more easily duped by false ...

Looking up reveals nature’s skylight, framing Arizona blue against fiery red stone in perfect composition. Photo credit: ...

Scientists have long known that ancient Homo sapiens and Neanderthals lived alongside each other for thousands of years—until ...

Thus far, our search for extraterrestrial life points toward Clarke’s former point, suggesting that our little blue dot is ...

A humanoid sea creature popularized in Japanese internet forums, the Ningen is an Antarctic cryptid that may have first been ...

This new group, which is led by Harvard professor Avi Loeb, aims to advise the Trump administration and the U.S. intelligence ...

Classic sci-fi films are still some of the most brilliant productions ever made, showing that truly timeless stories never go out of style.

Not all islands are surrounded by water. Some are ringed by wheat fields, highways, fences, suburbs and municipal boundaries. For the creatures trapped inside them, survival depends on ...

This is an edition of the Books Briefing, our editors’ weekly guide to the best in books. Sign up for it here. Oliva recommended six books in which the presence of aliens prompts readers to think more ...